This episode reveals that Bashir gave his diaries to Dax so she could understand him better. I wonder if his diaries contain information about his genetic enhancements?

Great Moment :

The relisation that Keiko's Big Coffee Clue was actually wrong, and he and Bashir were only saved by accident.

Plotline

O'Brien and Bashir help the T'Lani and Kellerun species to destroy the deadly "Harvesters", biological weapons of terrible power. But the former enemies are determined to destroy all knowledge of the weapons by killing everybody who could build them - including the Starfleet officers.